PreCoat TVL, chrome(III) pretreatment for aluminium
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Chrome(III) pretreatment of aluminium
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Excellent adhesion, corrosion protection and cost effective processing
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Meets international standards such as Qualicoat and GSB
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AD Chemicals PreCoat TVL, chrome(III) pretreatment for aluminium is a conversion coating that is used in the pretreatment of aluminium alloys prior to the coating process. PreCoat is the best hexavalent chromium alternative available in the market.
Contact
Contact us for more information
+31 (0) 167 526 900
Use of PreCoat TVL
PreCoat TVL is used to obtain a conversion coating on aluminium extrusions and panels. After immersion (or spraying) in PreCoat TVL, the wet film is dried on the aluminium surface without additional rinsing (so called no rinse system), prior to the powder coating.
- PreCoat TVLis suitable in spraying and immersion processes
- PreCoat provides good protection to under creep corrosion
- PreCoat provides excellent adhesion with organic coatings (e.g. powder paint systems)
- Meets international quality standards such as Qualicoat and GSB
More than 15 years of experience
AD Chemicals is already more than 15 years a leader in the field of chrome(VI)-free pretreatments for aluminium substrates. With PreCoat TVL you can rely on a pretreatment system that delivers quality as promised.
Independently tested by IFO Germany
“Is the requirement of 1008 hours corrosion resistance which Qualicoat prescribes enough?”
AD Chemicals doubts this statement of Qualicoat. When you only focus on the 1008 hours corrosion resistance, that has been described in the past, Qualicoat is right. However, the corrosion resistance of chromium (VI) based pretreatments fulfills the 2500 hours. This was a fair value for Chromium (VI) based pretreatments on Aluminium. AD Chemicals has investigated their chromium-free systems on the corrosion resistance of 3024 hours and compared it with the traditional chromium(VI) systems.
Internal research shows that the tpretreatment of AD Chemicals PreCoat TVL achieved a corrosion resistance of 2500-3024 hours. With an AD Chemicals pretreatment you can count on the best corrosion resistance available in the market.
Results AASS 3024 hours
Results after 3024 hours AASS according DIN EN ISO 9227 performed by IFO (Germany).
AD Chemicals is specialized in chromium(VI)-free conversion coatings and passivations. These products are marketed under the brandname PreCoat.
Pre-treatment chemicals prior to coating
AD Chemicals develops, produces and supplies a wide range of products to pretreat aluminium surfaces prior to a coating process. This can be both a powder-coating and liquid paint process. AD products significantly enhance adhesion, corrosion protection and general surface quality of the finished product. All products are certified by or tested against international quality standards such as Qualicoat and GSB. The products can be applied in dip, spray and cascade processes.
The product portfolio for aluminium pretreatment
- AD is specialized in developing chrome(VI)-free conversion coatings (brandname PreCoat), completely free of chromium (chromefree) or on chromium trivalent basis.
- Degreasers, Etch, Etch additives, desmut/neutralisation, chromate based products and chrome free products
- Paint strippers for aluminium
AD, the chromefree specialist
Also companies that are seeking improvement in an already chromefree process can count on AD. AD has an extensive track record in optimizing the performance and efficiency of chemical pretreatment lines.
Pre-treatment
Durability and extended end-use life are demands that consumers take for granted and of which they expect continuous improvement year on year. Paint adhesion and corrosion resistance are critical factors in keeping end-use applications in a condition that is expected to remain in place for their usable life time.
Aluminium passivation
Aluminium passivation creates a clear, thin protective layer that offers excellent corrosion resistance — even without additional coating (bare corrosion protection). This process also enhances paint adhesion and improves the durability of the surface.
Anodizing
AD Chemicalso has expert knowledge and offers a wide variety of chemicals and additives for the anodizing process.
Other AD Metal Surface Treatment solutions
PreCoat A34 conversion coating for aluminium
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Alternative for Chrome (VI) based conversion coatings, chrome (III) basis
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For customers that require passivation properties next to excellent adhesion and corrosion protection
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Meets or exceeds Qualicoat, GSB and MIL-DTL 81706B/5541 standards
PreCoat A34 is a trivalent chromium based conversion coating for aluminium. It creates a clear thin conversion layer on the aluminium substrate that improves paint adhesion and corrosion protection. Unique about PreCoat A34 is that it also offers passivation properties.
Contact
Contact us for more information
+31 (0) 167 526 900
PreCoat A34: Conversion coating (and passivation)
Application of PreCoat A34 creates a conversion layer on the aluminium surface the improves corrosion resitance and adhesion properties. Unique feature is that it also creates a passivation layer on the aluminium surface. This passivation layer provides so called bare corrosion protection, in other words; corrosion protection of the aluminium without a coating. The characteristics of this layer are comparable with hexavalent chromium based passivation layers and in some cases it even outperforms chromium-6 corrosion protection values. The product is Qualicoat certified.
Application areas
Common application areas for PreCoat A34 are: Architectural/Construction industry.
PreCoat A34 provides superior corrosion resistance and durable adhesive bonding with all common powdercoating and wet paints.
Quality standard
Extensive laboratory and field testing demonstrates that PreCaoat A324meets or exceeds the quality standards described in Qualicoat, GSB and MIL-DTL 81706B/5541.
It is the perfect alternative to hexavalent chromium for customers that seek passivation properties in a conversion coating.
Corrosion resistance according to ASTM B117
Bare corrosion resistance per aluminium alloy.
| Alloy | Bare corrosion resistance |
| AA5005 | >1000 hr |
| AA5754 | >1000 hr |
| AA6060 | >1000 hr |
| AA6061-T6 | >3000 hr |
| AA6063 | >1000 hr |
| AA6082 | >1000 hr |
Exceeding the market standard
AD Chemicals has more than 15 years of experience in developing and supplying chromium(VI)-free pre-treatment products. It has built a track record of working for renown aluminium processing companies all around the globe.
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Other AD Metal Surface Treatment solutions
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